I continue the
September selection of new useful pieces for web designers.
Services and tools
Cut & Slice me is a free Photoshop plugin that helps you quickly prepare design elements for various types of devices.

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Webplatform.org is a huge documentation base on all web technologies from Apple, Adobe, Facebook, Google, HP, Microsoft, Mozilla, Nokia, and Opera.
Mobile Mozaic - a gallery of excellent application interfaces for mobile devices.
Ribbon Builder is a service for quickly creating beautiful stripes.
Viewport Resizer is a bookmarklet tool for quick testing of responsive design.
Endless Icons - a site where quality icons appear every day, designed in the same style.
World Cloud Generator is a service for creating a beautiful cloud from keywords.
Responsive Sketchsheets -
ZURB PDF templates for rapid prototyping of responsive design on paper.
Simply Testable is a website validation service with Twitter Bootstrap interface. Checks a lot of pages.

Plugins
jBar - plugin to create a simple and beautiful horizontal bar.
Pikaday - plugin to select the date.
Sly is a flexible and simple plugin for creating convenient image scrolling.
Spin.js is a useful plugin for creating a bootable "twist" of the desired size and shape.

SEP
Tooltipster - jquery plugin that helps to quickly create beautiful tooltips.

Free buns
OCT
Application Icon Set - a set of 120 icons for applications in formats png, psd, csh.

A selection of
background textures and patterns for Photoshop and Illustrator. And one more
similar selection .
JWH font from
Dima Baga
Prosto - cool font from
Pavel Emelyanov and
Ivan Gladkikh .
Ligature Symbols is an icon font with 200+ characters in SVG, EOT, TTF, WOFF formats from Kazuyuki Motoyama.

Excellent
device layouts with different screen resolutions to demonstrate responsive design.

Unusual
gesture icons on touchscreens.

Free quality
UI kit .
Golden Bootstrap is a set of less-rules for Bootstrap, which allows you to position the site elements according to the golden section rule.
